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Finding the Fourth Proportional to 13,172.92, 18,176.34 and 7,867.42

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Solution

The fourth proportional to 13,172.92, 18,176.34 and 7,867.42 is: 10,855.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,172.92 : 18,176.34 = 7,867.42 : x
  2. Step 2: Convert to fraction form
    13,172.92/18,176.34 = 7,867.42/x
  3. Step 3: Cross multiply
    13,172.92x = 18,176.34 × 7,867.42
  4. Step 4: Simplify right side
    13,172.92x = 143,000,900.84
  5. Step 5: Solve for x
    x = 143,000,900.84/13,172.92
  6. Step 6: Final answer
    x = 10,855.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.